[experiment] add alternative wasm sqlite3 implementation available via build-tag (#2863)

This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).

vendor/github.com/tetratelabs/wazero/internal/wasmruntime/errors.go

@@ -0,0 +1,50 @@
+// Package wasmruntime contains internal symbols shared between modules for error handling.
+// Note: This is named wasmruntime to avoid conflicts with the normal go module.
+// Note: This only imports "api" as importing "wasm" would create a cyclic dependency.
+package wasmruntime
+
+var (
+	// ErrRuntimeStackOverflow indicates that there are too many function calls,
+	// and the Engine terminated the execution.
+	ErrRuntimeStackOverflow = New("stack overflow")
+	// ErrRuntimeInvalidConversionToInteger indicates the Wasm function tries to
+	// convert NaN floating point value to integers during trunc variant instructions.
+	ErrRuntimeInvalidConversionToInteger = New("invalid conversion to integer")
+	// ErrRuntimeIntegerOverflow indicates that an integer arithmetic resulted in
+	// overflow value. For example, when the program tried to truncate a float value
+	// which doesn't fit in the range of target integer.
+	ErrRuntimeIntegerOverflow = New("integer overflow")
+	// ErrRuntimeIntegerDivideByZero indicates that an integer div or rem instructions
+	// was executed with 0 as the divisor.
+	ErrRuntimeIntegerDivideByZero = New("integer divide by zero")
+	// ErrRuntimeUnreachable means "unreachable" instruction was executed by the program.
+	ErrRuntimeUnreachable = New("unreachable")
+	// ErrRuntimeOutOfBoundsMemoryAccess indicates that the program tried to access the
+	// region beyond the linear memory.
+	ErrRuntimeOutOfBoundsMemoryAccess = New("out of bounds memory access")
+	// ErrRuntimeInvalidTableAccess means either offset to the table was out of bounds of table, or
+	// the target element in the table was uninitialized during call_indirect instruction.
+	ErrRuntimeInvalidTableAccess = New("invalid table access")
+	// ErrRuntimeIndirectCallTypeMismatch indicates that the type check failed during call_indirect.
+	ErrRuntimeIndirectCallTypeMismatch = New("indirect call type mismatch")
+	// ErrRuntimeUnalignedAtomic indicates that an atomic operation was made with incorrect memory alignment.
+	ErrRuntimeUnalignedAtomic = New("unaligned atomic")
+	// ErrRuntimeExpectedSharedMemory indicates that an operation was made against unshared memory when not allowed.
+	ErrRuntimeExpectedSharedMemory = New("expected shared memory")
+	// ErrRuntimeTooManyWaiters indicates that atomic.wait was called with too many waiters.
+	ErrRuntimeTooManyWaiters = New("too many waiters")
+)
+
+// Error is returned by a wasm.Engine during the execution of Wasm functions, and they indicate that the Wasm runtime
+// state is unrecoverable.
+type Error struct {
+	s string
+}
+
+func New(text string) *Error {
+	return &Error{s: text}
+}
+
+func (e *Error) Error() string {
+	return e.s
+}