generate qr code svg (#2815)

* generate qr code svg prototype

* qr code for groups
fix formatting

* - letter avatar in qrcode
- escape xml in userinput (display/groupname)
- fix "Me" display name
- merge import declarations

* remove dot at the end of VerifyContactQRDescription

* if addr == displayname, show only one of them

Especially useful for yggmail accounts without usernames,
because the text would overflow otherwise.

* use real clipPath for rounded avatar

* - center avatar text better (dominant-baseline)
- add "sans-serif" to font fallback for text if arial is missing

* make corner always blue

* add [logo + "get.delta.chat"] footer to qrcode

* Update deltachat-ffi/deltachat.h

Co-authored-by: bjoern <r10s@b44t.com>

* Apply suggestions from code review

Co-authored-by: bjoern <r10s@b44t.com>

* new card design
- add stockstrings
- update changelog

* make qrcode pixels also #f2f2f2 instead of full white

* rename VERIFY_CONTACT_QR_DESC to SETUP_CONTACT
make footer text a tiny bit darker upon r10s's request

* avoid using  which is a doxygen command

* point out that one will join a group (this is still shorted and was also suggested in recent chats)

* add option to generate qr-code-svg to repl tool

* use same font-family in text and footer

* thinner card border

* remove superfluous <tspan> from footer to make color tweaking easier

* move font-weight to style, ios renderer does not pick it up from attribute; remove default font attributes not used consequently

* make get.delta.chat more visible

* align properly using dominant-baseline=central and alignment-baseline=middle, this makes things nice on all systems but android (before, ios was wrong and all others not 100% aligned as font metrics are ignored) (android needs a subsequent improvement)

Co-authored-by: bjoern <r10s@b44t.com>

Cargo.lock

@@ -706,7 +706,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
 dependencies = [
  "bitflags",
- "textwrap",
+ "textwrap 0.11.0",
  "unicode-width",
 ]
 
@@ -1098,6 +1098,7 @@ dependencies = [
  "pgp",
  "pretty_env_logger",
  "proptest",
+ "qrcodegen",
  "quick-xml",
  "r2d2",
  "r2d2_sqlite",
@@ -1116,7 +1117,9 @@ dependencies = [
  "strum",
  "strum_macros",
  "surf",
+ "tagger",
  "tempfile",
+ "textwrap 0.14.2",
  "thiserror",
  "toml",
  "url",
@@ -2758,6 +2761,12 @@ dependencies = [
  "regex-syntax",
 ]
 
+[[package]]
+name = "qrcodegen"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "135e6754eed8ca897dd70584d895e72e36860b3e163b6bcedce48571cbaef343"
+
 [[package]]
 name = "quick-error"
 version = "1.2.3"
@@ -3381,6 +3390,12 @@ version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ecab6c735a6bb4139c0caafd0cc3635748bbb3acf4550e8138122099251f309"
 
+[[package]]
+name = "smawk"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f67ad224767faa3c7d8b6d91985b78e70a1324408abcb1cfcc2be4c06bc06043"
+
 [[package]]
 name = "socket2"
 version = "0.3.19"
@@ -3582,6 +3597,12 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "tagger"
+version = "3.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c933e626196d509b053f49573e35ad237c0ff6a36c23c1aa61ffeab49251d24f"
+
 [[package]]
 name = "tap"
 version = "1.0.1"
@@ -3620,6 +3641,17 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
+dependencies = [
+ "smawk",
+ "unicode-linebreak",
+ "unicode-width",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.30"
@@ -3817,6 +3849,15 @@ version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a01404663e3db436ed2746d9fefef640d868edae3cceb81c3b8d5732fda678f"
 
+[[package]]
+name = "unicode-linebreak"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a52dcaab0c48d931f7cc8ef826fa51690a08e1ea55117ef26f89864f532383f"
+dependencies = [
+ "regex",
+]
+
 [[package]]
 name = "unicode-normalization"
 version = "0.1.19"