feat: collect() returns a tibble

[krlmlr]

Closes #438.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if bd8b45b is merged into main:

• ✔️001_tpch_01: 24.5ms -> 24.9ms [-3.08%, +6.09%]
• ✔️001_tpch_02: 72.8ms -> 74.1ms [-1.09%, +4.48%]
• ✔️001_tpch_03: 41.3ms -> 41.3ms [-2.11%, +2.15%]
• ✔️001_tpch_04: 23.7ms -> 23.3ms [-4.82%, +1.3%]
• ✔️001_tpch_05: 61.8ms -> 61.3ms [-3.5%, +2.06%]
• 🚀001_tpch_06: 20.9ms -> 15.1ms [-31.23%, -24.61%]
• ✔️001_tpch_07: 79.2ms -> 79.8ms [-1.43%, +2.97%]
• ✔️001_tpch_08: 107ms -> 110ms [-0.3%, +4.63%]
• ✔️001_tpch_09: 79.8ms -> 80.3ms [-2.41%, +3.79%]
• ✔️001_tpch_10: 53.9ms -> 53.5ms [-3.85%, +2.52%]
• ✔️001_tpch_11: 33.7ms -> 34.5ms [-1.09%, +5.82%]
• ✔️001_tpch_12: 28.1ms -> 28.6ms [-0.93%, +5.08%]
• ✔️001_tpch_13: 27.6ms -> 28.4ms [-1.68%, +7.4%]
• ✔️001_tpch_14: 21.2ms -> 21.5ms [-2.14%, +4.7%]
• ✔️001_tpch_15: 32.7ms -> 33ms [-1.6%, +2.88%]
• ✔️001_tpch_16: 42ms -> 42.8ms [-1.08%, +5.24%]
• ✔️001_tpch_17: 27.9ms -> 28.3ms [-3.09%, +5.97%]
• ✔️001_tpch_18: 24ms -> 24.1ms [-2.97%, +4.29%]
• ✔️001_tpch_19: 72.1ms -> 71.7ms [-2.48%, +1.41%]
• ✔️001_tpch_20: 55.3ms -> 56.4ms [-1.12%, +4.93%]
• ✔️001_tpch_21: 85.3ms -> 83.6ms [-4.45%, +0.52%]
• ✔️001_tpch_22: 73.5ms -> 73ms [-3.13%, +1.93%]
• ✔️010_tpch_01: 85ms -> 83ms [-5.97%, +1.35%]
• ✔️010_tpch_02: 73.5ms -> 72.7ms [-4.41%, +2.1%]
• ✔️010_tpch_03: 60.7ms -> 61.4ms [-1.15%, +3.36%]
• ✔️010_tpch_04: 45.2ms -> 45.5ms [-5.44%, +7.05%]
• ✔️010_tpch_05: 93.4ms -> 94.7ms [-2.83%, +5.77%]
• ✔️010_tpch_06: 34.6ms -> 33.7ms [-11.77%, +6.41%]
• ✔️010_tpch_07: 109ms -> 111ms [-1.34%, +4.13%]
• ✔️010_tpch_08: 132ms -> 133ms [-2.16%, +4.13%]
• ✔️010_tpch_09: 123ms -> 123ms [-4.05%, +4.81%]
• ✔️010_tpch_10: 77.8ms -> 79.3ms [-2.39%, +6.04%]
• ✔️010_tpch_11: 39.4ms -> 41.4ms [-0.32%, +10.25%]
• ✔️010_tpch_12: 59.6ms -> 60.2ms [-3.63%, +5.71%]
• ✔️010_tpch_13: 54ms -> 54.8ms [-1.57%, +4.55%]
• ✔️010_tpch_14: 39.7ms -> 40.1ms [-3.69%, +5.59%]
• ✔️010_tpch_15: 56.3ms -> 56.2ms [-4.71%, +4.38%]
• ✔️010_tpch_16: 46.8ms -> 46.4ms [-5.43%, +3.6%]
• ✔️010_tpch_17: 56.8ms -> 55.3ms [-6.62%, +1%]
• ✔️010_tpch_18: 56.2ms -> 57.2ms [-7.9%, +11.61%]
• ✔️010_tpch_19: 118ms -> 117ms [-1.6%, +0.67%]
• ✔️010_tpch_20: 67.7ms -> 67.8ms [-2.9%, +3.27%]
• ✔️010_tpch_21: 243ms -> 247ms [-1.03%, +4.25%]
• ✔️010_tpch_22: 80.9ms -> 80ms [-4.83%, +2.62%]
• ✔️100_tpch_01: 332ms -> 301ms [-19.1%, +0.66%]
• ✔️100_tpch_02: 144ms -> 129ms [-23.31%, +2.55%]
• ✔️100_tpch_03: 182ms -> 184ms [-1.69%, +3.75%]
• ✔️100_tpch_04: 152ms -> 152ms [-10.33%, +10.62%]
• ✔️100_tpch_05: 263ms -> 269ms [-1.76%, +6.07%]
• ✔️100_tpch_06: 102ms -> 102ms [-1.86%, +1.74%]
• ✔️100_tpch_07: 252ms -> 252ms [-10.01%, +10.18%]
• 🚀100_tpch_08: 289ms -> 272ms [-8.79%, -2.54%]
• ✔️100_tpch_09: 336ms -> 355ms [-11.76%, +22.72%]
• ✔️100_tpch_10: 220ms -> 226ms [-1.54%, +6.28%]
• ✔️100_tpch_11: 87.1ms -> 90.1ms [-14.58%, +21.47%]
• ✔️100_tpch_12: 206ms -> 186ms [-22.68%, +3.95%]
• ✔️100_tpch_13: 354ms -> 348ms [-13.91%, +10.76%]
• ✔️100_tpch_14: 122ms -> 124ms [-15.67%, +20.12%]
• 🚀100_tpch_15: 230ms -> 206ms [-20.45%, -0.05%]
• ✔️100_tpch_16: 132ms -> 132ms [-4%, +3.52%]
• ✔️100_tpch_17: 183ms -> 179ms [-12.68%, +8.46%]
• ✔️100_tpch_18: 201ms -> 194ms [-8.01%, +1.04%]
• ✔️100_tpch_19: 292ms -> 288ms [-4.68%, +1.32%]
• ✔️100_tpch_20: 178ms -> 183ms [-2.09%, +7.99%]
• ✔️100_tpch_21: 1.37s -> 1.34s [-8.4%, +4.53%]
• ✔️100_tpch_22: 179ms -> 177ms [-14.69%, +11.62%]

Further explanation regarding interpretation and methodology can be found in the documentation.