readme: add docker image

Exclude testing PRs from release notes

Missing performance section

tomll: add multiLineArray flag to linter (pelletier#578)

Configure issues templates

Ask people to go to /discussions for anything that is not a bug report.

AST Tweaks (pelletier#551)

* Use pointers instead of copying around ast.Node

Node is a 56B struct that is constantly in the hot path. Passing nodes
around by copy had a cost that started to add up. This change replaces
them by pointers. Using unsafe pointer arithmetic and converting
sibling/child indexes to relative offsets, it removes the need to carry
around a pointer to the root of the tree. This saves 8B per Node. This
space will be used to store an extra []byte slice to provide contextual
error handling on all nodes, including the ones whose data is different
than the raw input (for example: strings with escaped characters), while
staying under the size of a cache line.

* Remove conditional

* Add Raw to track range in data for parsed values

* Simplify reference tracking

Suggest using go-toml v2

Increase test coverage (pelletier#538)

Also fix array in map bug.

Fix empty trees line counting (pelletier#539)

Refs pelletier#450

Readme (pelletier#535)