Install CLI to ~/.local/bin without sudo

[theFong]

Summary

• Install scripts (bin/install-latest.sh, bin/install-latest-linux.sh) now drop the binary into ~/.local/bin with no sudo, creating the directory if needed and warning when it's not on PATH.
• README updated: removed sudo from the Linux/WSL install commands, switched to the curl ... | bash form, and added a short note pointing users at ~/.local/bin and the PATH line to add if missing.

Test plan

• Run bash bin/install-latest.sh on macOS with ~/.local/bin already on PATH — confirm install succeeds with no warning.
• Run bash bin/install-latest.sh on a fresh Linux box without ~/.local/bin on PATH — confirm the warning prints with the suggested export line.
• Verify the README install command runs end-to-end via curl ... | bash.

[theFong]

Tested

macOS (arm64, host)

• bash bin/install-latest.sh → installed ~/.local/bin/brev (v0.6.323), Mach-O arm64.
• ~/.local/bin was already on PATH → no warning printed (correct).
• brev --version runs.

Ubuntu 22.04 (Docker, fresh container)

• Test 1 — fresh PATH (no ~/.local/bin): installer placed binary at /root/.local/bin/brev and printed:

  Warning: /root/.local/bin is not in your PATH.
  Add it by appending the following line to your shell profile (e.g. ~/.bashrc, ~/.zshrc):
      export PATH="${HOME}/.local/bin:${PATH}"
  Then restart your shell or run 'source' on the profile to pick up the change.
  

• ~/.local/bin/brev --version → Current Version: v0.6.323.
• Test 2 — re-ran with ~/.local/bin prepended to PATH: no warning printed (correct), which brev resolves to /root/.local/bin/brev.

[patelspratik]

brev upgrade text needs to be altered to match that sudo is no longer required

brev upgrade also needs to be made aware as the upgrade will install to the new location

[codecov]

Codecov Report

❌ Patch coverage is 28.00000% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 18.85%. Comparing base (9e0e34b) to head (f0a2ac5).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/cmd/upgrade/upgrade.go	28.00%	14 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #379      +/-   ##
==========================================
+ Coverage   18.18%   18.85%   +0.66%     
==========================================
  Files         140      140              
  Lines       18684    18206     -478     
==========================================
+ Hits         3398     3433      +35     
+ Misses      14912    14390     -522     
- Partials      374      383       +9     

Flag	Coverage Δ
Linux	18.85% <28.00%> (+0.66%)	⬆️

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