Insensitive to capital letters and dimension names in general

In the following MWE

using YAXArrays
using DimensionalData
using Dates
using Zarr

axlist = (
    Dim{:Ti}(Date("2022-01-01"):Day(1):Date("2022-01-30")),
    Dim{:lon}(range(1, 10, length=10)),
    Dim{:lat}(range(1, 5, length=15)),
    Dim{:Variable}(["var1", "var2"])
    )

data1 = rand(30, 10, 15, 2)
ds1 = YAXArray(axlist, data1)

ds1[Variable = At("var1")]

if you do

ds1[variable = At("var1")]

ds1[var = At("var1")]

ds1[v = At("var1")]

Weirdly, all the previous options return "var1", when the expected behavior is to fail as non "variable", "var", or "v" exist as dimensions. I'm not certain if this is an issue with DimensionalData or YAXArrays.

# Only this one fails
ds1[d = At("var1")]

Start by running the Julia MWE in the issue and reproduce the successful lookups for Variable, variable, var, and v, plus the failing d lookup. Trace whether dimension-name matching is handled by YAXArrays or DimensionalData; done means nonexistent dimension names consistently fail while the valid Variable lookup still returns var1.