rename the project to khosra, initialise the module

Naming is free before a module is published, a URL is shared, or a binary is
deployed; every day it waits costs more. Swept every form: module path, binary,
cmd/ directory, KHOSRA_SITE, the feature-loop skill directory, and the prose in
earlier ADRs — which describe this project under its old name, not a different
project. Recorded as ADR-0030.

go mod init lands here rather than with the first feature because the module
path is what the rename is about. x/text and yaml.v3 are required but not yet
imported, so both are indirect and no direct dependency is claimed yet.

.claude/settings.json

@@ -19,6 +19,8 @@
       "Bash(git diff:*)",
       "Bash(git log:*)",
       "Bash(git show:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
       "Bash(rg:*)",
       "Bash(wc:*)",
       "Bash(curl -s http://localhost:*)",