Bump to v0.1.1 with packaging and migration fixes

Manifest version moves to 0.1.1.0 so Dalamud offers existing
testers an in-place update once the new release is published.

Description rewritten to lead with the "built on top of Chat 2"
framing — every upstream feature, command and shortcut still
works identically — and to position the privacy additions as
alignment with modern EU, US and Japanese data-protection
expectations rather than citing specific paragraphs.

Punchline becomes "Chat 2 with privacy controls aligned to EU,
US and JP rules" so the plugin-list one-liner reflects what's
actually different rather than just calling itself a fork.

Changelog entry for 0.1.1 covers the three changes since 0.1.0:
icon now in the bundle (DalamudPackager override), icon resized
to 256×256, migration hardened with per-file try/catch and a
warning notification when files are locked, plus the README
troubleshooting section.

repo.json regenerated to 0.1.1.0 with the v0.1.1 release asset
URL so the custom-repo manifest matches what GitHub will serve.

ChatTwo/ChatTwo.csproj

@@ -4,7 +4,7 @@
              0.1.0 is our bootstrap release; the underlying Chat 2 base is
              called out in the yaml changelog so users can see what it
              derives from. -->
-        <Version>0.1.0</Version>
+        <Version>0.1.1</Version>
         <ImplicitUsings>enable</ImplicitUsings>
         <!-- HellionChat fork: assembly is renamed so Dalamud uses
              pluginConfigs/HellionChat instead of pluginConfigs/ChatTwo,