fix(sol): allow zero column group by (#1058)

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# Rationale for this change

We want to support 0 column group bys for on chain queries.

# What changes are included in this PR?

Allowing 0 column group bys in the solidity

# Are these changes tested?
Yes

test: replace `legacy_filter` with `filter` in tests (#1054)

# Rationale for this change
Eliminate `legacy_filter` in almost all places not explicitly about it

refactor(sol): move `compute_filter_fold` to `FilterExec.presl` (#1056)

# Rationale for this change
Reduce dependency on `LegacyFilterExec.presl` to facilitate its eventual
removal.

fix: remove "generalized" from the codebase (#1053)

# Rationale for this change
Remove remaining "generalized" words from the codebase

feat!: switch to `GeneralizedFilterExec` in the planner (#1048)

# Rationale for this change
This PR should achieve the cutover to `GeneralizedFilterExec` and have
end to end tests working.

---------

Co-authored-by: Claude <[email protected]>

test: replace `filter()` with `generalized_filter()` in tests (#1050)

# Rationale for this change
We need to rapidly do away with the legacy `FilterExec` and this is the
next step.

feat: add `EVMGeneralizedFilterExec` (#1049)

Depends on #1030.
# Rationale for this change
Add `EVMGeneralizedFilterExec` in preparation for solidity PRs.

---------

Co-authored-by: Claude <[email protected]>

feat(sol): `SortMergeJoinExec` (#979)

Please be sure to look over the pull request guidelines here:
https://github.com/spaceandtimelabs/sxt-proof-of-sql/blob/main/CONTRIBUTING.md#submit-pr.

# Please go through the following checklist
- [ ] The PR title and commit messages adhere to guidelines here:
https://github.com/spaceandtimelabs/sxt-proof-of-sql/blob/main/CONTRIBUTING.md.
In particular `!` is used if and only if at least one breaking change
has been introduced.
- [ ] I have run the ci check script with `source
scripts/run_ci_checks.sh`.
- [ ] I have run the clean commit check script with `source
scripts/check_commits.sh`, and the commit history is certified to follow
clean commit guidelines as described here:
https://github.com/spaceandtimelabs/sxt-proof-of-sql/blob/main/COMMIT_GUIDELINES.md
- [ ] The latest changes from `main` have been incorporated to this PR
by simple rebase if possible, if not, then conflicts are resolved
appropriately.

# Rationale for this change

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 Add `NestedLoopJoinExec`.
 Closes #345.

Since we added `HashJoinExec` in #323 it has been possible to do
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 for `HashJoinExec`.
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# What changes are included in this PR?

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- Speed up `HashJoinExec`.
- Route joins to `NestedLoopJoinExec` if the outer input is sufficiently
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# Are these changes tested?
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feat: make `BigDecimalExt` public (#1046)

# Rationale for this change
Make `BigDecimalExt` public since the SDK needs to use it.

fix: address forge fmt issues (#1045)