feat: hot reload eszip bundle when function source changes

[avallete]

What kind of change does this PR introduce?

• Feat: add hot reloading to functions serve command
• Functions url's in the serve command

Screen.Recording.2025-06-10.at.12.01.27.mov

[coveralls]

Pull Request Test Coverage Report for Build 15585019893

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 368 of 536 (68.66%) changed or added relevant lines in 8 files are covered.
• 9 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.4%) to 55.511%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/utils/colors.go	0	3	0.0%
internal/utils/logger.go	9	16	56.25%
internal/functions/serve/serve.go	34	59	57.63%
internal/functions/serve/service.go	134	169	79.29%
internal/functions/serve/watcher.go	140	188	74.47%
internal/functions/serve/test_helpers.go	35	85	41.18%

Files with Coverage Reduction	New Missed Lines	%
internal/functions/serve/serve.go	4	52.22%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 15579624203:	0.4%
Covered Lines:	6280
Relevant Lines:	11313

---

💛 - Coveralls

[avallete]

Closing in favor of: #3710