refactor: consolidate assertion code and start adding some tests

[dmihalcik-virtru]

• Adds the --assertions option to the cli encrypt subcommand
• exports Assertion and related types as the @opentdf/client/assertions package
• Adds the ability to set the assertions from the cli tool as an AssertionConfig
• refactored code to move more assertion related code into assertions.ts, notably removing AssertionConfig.ts and moving hash verification into the appropriately named function (not method) in assertions.ts

[github-actions[bot]]

If these changes look good, signoff on them with:

git pull && git commit --amend --signoff && git push --force-with-lease origin

If they aren't any good, please remove them with:

git pull && git reset --hard HEAD~1 && git push --force-with-lease origin

[github-actions[bot]]

If these changes look good, signoff on them with:

git pull && git commit --amend --signoff && git push --force-with-lease origin

If they aren't any good, please remove them with:

git pull && git reset --hard HEAD~1 && git push --force-with-lease origin

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
90.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud