Convert error, warning, and message calls to cli messaging

[alanahjonas95]

resolves #748

[dragosmg]

Not sure the paste() call is needed here. The formatting seems to be off a bit (no space between footnote and "Test footnote 1" and the line break after for the).

We could get a bit more sophisticated and build the message (or the message details) with bullets:

cli::cli_inform(
    c(
        "The provided column location does not exist in the provided data for the footnote\"Test footnote 1\"",
        "i" = "Provided column location:",
        "*" = "trt: `Not A Column`"

    )
)
#> The provided column location does not exist in the provided data for the
#> footnote"Test footnote 1"
#> ℹ Provided column location:
#> • trt: `Not A Column`

[alanahjonas95]

agreed, this is nicer. I've updated the message using cli_inform() with an "i" info line and dynamically generated "*" bullets for each column/value pair

[dragosmg]

{cli} supports string interpolation with {glue}. Looking into this I realised this stop() / cli::cli_abort() call is not covered by unit tests.

[alanahjonas95]

Converted this to cli/glue implicit interpolation and added a new unit test

[dragosmg]

cli + paste or paste0 can usually be substituted with cli + implicit glue interpolation

[alanahjonas95]

replaced the paste/paste0 concatenation with implicit glue interpolation. Also swept the rest of the package for any other cli + paste/paste0 call sites and converted those to implicit glue interpolation too.

[github-actions]

🦺 Coverage summary

🟢 Merging PR #800 (38e367f) into main (c9c78d9) will increase overall coverage by 0.1 percentage points.
🔴 Diff coverage is 84.7% (182 out of 215 modified lines are covered by tests). It's good practice to aim for at least 97% (the base branch test coverage).

Details

Files with changes in coverage

File name	Coverage head	Coverage base	Δ
R/apply_frmt_methods.R	97.7%	95.8%	1.9	⬆️
R/body_plan.R	94.7%	92.8%	1.9	⬆️
R/col_plan.R	92.3%	93.5%	-1.2	⬇️
R/col_style_plan.R	93.9%	94.1%	-0.2	⬇️
R/footnote_plan.R	95.7%	95.4%	0.3	⬆️
R/print_to_ggplot.R	87.2%	86.8%	0.4	⬆️
R/row_group_plan.R	73.1%	67.9%	5.2	⬆️
R/tfrmt_sigdig.R	93.2%	94.4%	-1.2	⬇️
R/tfrmt.R	96.2%	96.5%	-0.3	⬇️
Overall	97.1%	97%	0.1	⬆️

Coverage for modified lines

File name	Lines modified	Lines tested	Coverage	Missing
R/JSON.R	4	1	25%	17, 76, 214
R/apply_col_style_plan.R	3	3	100%
R/apply_footnote_meta.R	19	19	100%
R/apply_frmt_methods.R	18	17	94.4%	178
R/apply_page_plan.R	3	3	100%
R/apply_row_grp_plan.R	4	4	100%
R/apply_table_frmt_plan.R	1	1	100%
R/apply_tfrmt.R	27	27	100%
R/big_n.R	6	6	100%
R/body_plan.R	3	0	0%	37-39
R/col_plan.R	11	10	90.9%	245
R/col_style_plan.R	10	9	90%	129
R/display_insights.R	3	3	100%
R/extract_data.R	1	1	100%
R/footnote_plan.R	6	5	83.3%	124
R/frmt_plans.R	6	0	0%	50, 62, 68, 70, 212, 214
R/page_plan.R	2	0	0%	113, 115
R/print_to_ggplot.R	14	13	92.9%	55
R/print_to_gt.R	10	10	100%
R/row_group_plan.R	6	0	0%	46, 47, 49, 86, 92, 94
R/struct_utils.R	4	4	100%
R/tfrmt.R	10	8	80%	263, 345
R/tfrmt_checks.R	24	24	100%
R/tfrmt_layer.R	8	7	87.5%	182
R/tfrmt_n_pct.R	2	2	100%
R/tfrmt_sigdig.R	10	5	50%	63, 225, 233-235
Total	215	182	84.7%

♻️ Comment updated with the latest results.

^{Created on 2026-08-11 with covr2gh v0.0.0.9041.}